D12320VF25V Datasheet, PDF (316/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 8 I/O Ports
8.10.4 MOS Input Pull-Up Function
Port E has a built-in MOS input pull-up function that can be controlled by software. This MOS
input pull-up function can be used in modes 4, 5, and 6 when 8-bit bus mode is selected, or in
mode 7, and can be specified as on or off on an individual bit basis.
When PEDDR bits are cleared to 0 in mode 4, 5, or 6 when 8-bit bus mode is selected, or in mode
7, setting the corresponding PEPCR bits to 1 turns on the MOS input pull-up for that pins.
The MOS input pull-up function is in the off state after a reset, and in hardware standby mode.
The prior state is retained in software standby mode.
Table 8.18 summarizes the MOS input pull-up states.
Table 8.18 MOS Input Pull-Up States (Port E)
Modes
Reset
Hardware
Standby Mode
Software
Standby Mode
7
OFF
OFF
ON/OFF
4 to 6 8-bit bus
16-bit bus
OFF
Legend:
OFF: MOS input pull-up is always off.
ON/OFF: On when PEDDR = 0 and PEPCR = 1; otherwise off.
In Other
Operations
ON/OFF
OFF
Rev.7.00 Feb. 14, 2007 page 282 of 1108
REJ09B0089-0700